Machining DataSheet for

General Information:
Material GroupK - Cast Iron
Sub-GroupCast Iron
Hardness220.0 HB
Tensile Strength730 [N/mm^2]
Machinability112%

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Machining Cast Iron GG25

GG25 is a Grey cast iron material with a Machinability rating of 112% and Hardness 220 HB.

Grey cast Iron is the most britle cast iron sub-group. It is the easiest to machine and produces tiny chips even when using a flat insert without a chip breaker

In Cast Iron, the material standards also define the allowed hardness range, and hardness is the top-ranking factor affecting the machinability ratings. For example, nodular cast iron is known to be harder to machine compared with grey cast iron. However, if a grey cast iron alloy has a hardness of 300HB is will have lower machinability than nodular cast iron with 200HB.

Cast iron is very brittle and produces short chips. Therefore there is no need for a sharp cutting edge, and a strong geometry with a large honing or K-land is the best choice.

Summery:

  • For general Turning of Cast Iron GG25 at stable conditions use a grade with a Very Hard substrate and CVD coating.
  • In case you are running at a cutting speed that is lower than 490 SFM (150 m/min), it is better to use a grade with a
    • Very Hard substrate and PVD coating.
  • For general Milling use a grade with a Semi Hard substrate and CVD coating.
  • For detailed carbide grades recommendations, check the Below Chart, or use the Grades Wizrad.
  • Recommended Cutting speed range for turning at stable conditions is 720 - 970 [SFM] / 220 - 295 [m/min].
  • Consider using CBN inserts. Although they cost more than twice, they enable increasing the cutting speed by 2-4 times (relative to carbide). Learn More ⇒
  • Recommended Cutting speed range for milling with stable clamping and short overhang is 490 - 660 [SFM] / 150 - 200 [m/min]
  • For detailed cutting speed recomendations, check the Below Table, or use our Speed and Feed Calculator.

    • Equivalent International Designations for Cast Iron GG25

    Standard Name
    saeA48-35B
    wnr0.6025
    dinGG25
    bsGrade 250
    ss125-00
    anforFt25D
    uniG25
    unfFG25
    js1FC25

    Chemical Composition for Cast Iron GG25

    Sorry, Not Availble for this Material


    Cutting Speeds Recomendations for Cast Iron GG25

    * Click on the speeds below for higher precision in specific conditions!

    ApplicationVc (m/min)Vc (SFM)
    Turning220-295720-970
    Milling150-200490-660
    Parting110-150360-490
    Grooving150-205490-670
    Drilling125-165410-540

    Important! The speed estimation is given for an ideal situation:

    • Most suitable carbide grade
    • Stable tool clamping
    • Stable workpiece clamping
    • Good quality raw material
    • A short overhang of the cutting tool.
    • Nominal hardness of the material.
    • etc.
    Click on the speeds in the above table to get better precision for specific parameters
    Or use our Speed and Feed Calculator


    Recommended Carbide Grades for Cast Iron GG25

    * If you do nott understand the below table? Read This Explanation to make the most out of it!

    Grade for Turning

    Brand Grade ISO Material app App Coating Apps Range 05 10 15 20 25 30 35 40 45
    Sandvik GC3205 K K - Cast Iron T Turning CVD K05 - K15 K K K
    Sandvik GC3210 K K - Cast Iron T Turning CVD K10 - K25 K K K K
    Sandvik GC3225 K K - Cast Iron T Turning CVD K25 - K40 K K K K
    Iscar IC807 (IC907) K K - Cast Iron T Turning PVD K05 - K25 K K K K K
    Iscar IC5005 K K - Cast Iron T Turning CVD K05 - K15 K K K
    Iscar IC5010 (IC428) K K - Cast Iron T Turning CVD K10 - K25 K K K K
    Iscar IC830 (IC328) K K - Cast Iron T Turning PVD K25 - K45 K K K K K
    Iscar IC8150 K K - Cast Iron T Turning CVD K25 - K35 K K K
    Kennametal KCU10 (KC5010) K K - Cast Iron T Turning PVD K05 - K20 K K K K
    Kennametal KCK05 K K - Cast Iron T Turning CVD K05 - K15 K K K
    Kennametal KCK15B (KCK15) K K - Cast Iron T Turning CVD K10 - K20 K K K
    Kennametal KCK20 K K - Cast Iron T Turning CVD K15 - K30 K K K K
    Kennametal KCU25 (KC5025) K K - Cast Iron T Turning PVD K20 - K30 K K K
    Kennametal KCP10B (KCP10) K K - Cast Iron T Turning CVD K25 - K35 K K K
    Kennametal KCP25B (KCP25) K K - Cast Iron T Turning CVD K30 - K40 K K K
    Walter WKK10S K K - Cast Iron T Turning CVD K05 - K20 K K K K
    Walter WKK20S K K - Cast Iron T Turning CVD K10 - K30 K K K K K
    Seco TH1500 K K - Cast Iron T Turning CVD K05 - K10 K K
    Seco TK0501 K K - Cast Iron T Turning CVD K05 - K20 K K K K
    Seco TK1501 K K - Cast Iron T Turning CVD K10 - K25 K K K K
    Seco CP500 K K - Cast Iron T Turning PVD K15 - K30 K K K K
    Seco TP0501 K K - Cast Iron T Turning CVD K25 - K35 K K K
    Seco CP600 K K - Cast Iron T Turning PVD K25 - K45 K K K K K
    Tungaloy T5105 K K - Cast Iron T Turning CVD K05 - K15 K K K
    Tungaloy T515 K K - Cast Iron T Turning CVD K10 - K20 K K K
    Tungaloy T5115 K K - Cast Iron T Turning CVD K10 - K20 K K K
    Tungaloy T5125 K K - Cast Iron T Turning CVD K15 - K30 K K K K
    Mitsubishi MC5005 (UC5105) K K - Cast Iron T Turning CVD K05 - K15 K K K
    Mitsubishi MC5015 (UC5115) K K - Cast Iron T Turning CVD K10 - K25 K K K K
    Mitsubishi VP15TF K K - Cast Iron T Turning PVD K20 - K35 K K K K
    Sumitomo AC4010K (AC405K) K K - Cast Iron T Turning CVD K05 - K15 K K K
    Sumitomo AC1030U K K - Cast Iron T Turning PVD K10 - K30 K K K K K
    Sumitomo AC4015K K K - Cast Iron T Turning CVD K10 - K25 K K K K
    Sumitomo AC420K K K - Cast Iron T Turning CVD K15 - K30 K K K K

    Grade for Milling (Indexable)

    Brand Grade ISO Material app App Coating Apps Range 05 10 15 20 25 30 35 40 45
    Sandvik GC3330 K K - Cast Iron M Milling CVD K10 - K25 K K K K
    Sandvik GC3040 K K - Cast Iron M Milling CVD K25 - K40 K K K K
    Iscar IC5100 K K - Cast Iron M Milling CVD K05 - K25 K K K K K
    Iscar IC810 (IC910) K K - Cast Iron M Milling PVD K15 - K35 K K K K K
    Kennametal KCK15 K K - Cast Iron M Milling CVD K10 - K20 K K K
    Kennametal KC520M K K - Cast Iron M Milling PVD K15 - K25 K K K
    Kennametal KCPK30 K K - Cast Iron M Milling CVD K25 - K40 K K K K
    Walter WAK15 K K - Cast Iron M Milling CVD K05 - K25 K K K K K
    Walter WKP25S (WKP25) K K - Cast Iron M Milling CVD K15 - K35 K K K K K
    Walter WKP35G K K - Cast Iron M Milling CVD K25 - K45 K K K K K
    Seco MK1500 K K - Cast Iron M Milling CVD K05 - K30 K K K K K K
    Seco MK2050 K K - Cast Iron M Milling PVD K10 - K45 K K K K K K K K
    Tungaloy T1215 K K - Cast Iron M Milling CVD K10 - K25 K K K K
    Tungaloy AH725 K K - Cast Iron M Milling PVD K15 - K30 K K K K
    Tungaloy AH120 K K - Cast Iron M Milling PVD K15 - K30 K K K K
    Mitsubishi MC5020 K K - Cast Iron M Milling CVD K05 - K30 K K K K K K
    Mitsubishi VP20RT K K - Cast Iron M Milling PVD K20 - K40 K K K K K
    Sumitomo XCK2000 K K - Cast Iron M Milling CVD K05 - K20 K K K K
    Sumitomo ACU2500 K K - Cast Iron M Milling PVD K10 - K35 K K K K K K
    Sumitomo XCU2500 K K - Cast Iron M Milling CVD K10 - K25 K K K K
    Sumitomo ACK2000 (ACK200) K K - Cast Iron M Milling CVD K10 - K25 K K K K
    Sumitomo ACK3000 (ACK300) K K - Cast Iron M Milling PVD K15 - K30 K K K K

    Grade for Parting Off

    Brand Grade ISO Material app App Coating Apps Range 05 10 15 20 25 30 35 40 45
    Sandvik GC4325 K K - Cast Iron P Parting CVD K10 - K20 K K K
    Sandvik GC1135 K K - Cast Iron P Parting PVD K20 - K40 K K K K K
    Iscar IC807 (IC907) K K - Cast Iron P Parting PVD K05 - K15 K K K
    Iscar IC808 (IC908) K K - Cast Iron P Parting PVD K10 - K25 K K K K
    Iscar IC830 ( IC328) K K - Cast Iron P Parting PVD K20 - K40 K K K K K
    Kennametal KCU10 K K - Cast Iron P Parting PVD K05 - K15 K K K
    Kennametal KCU25 K K - Cast Iron P Parting PVD K15 - K30 K K K K
    Walter WKP13S K K - Cast Iron P Parting CVD K05 - K20 K K K K
    Walter WKP23S K K - Cast Iron P Parting CVD K10 - K30 K K K K K
    Walter WKP33S K K - Cast Iron P Parting CVD K20 - K40 K K K K K
    Seco CP500 K K - Cast Iron P Parting PVD K20 - K40 K K K K K
    Seco CP600 K K - Cast Iron P Parting PVD K40 - K50 K K
    Tungaloy GH130 K K - Cast Iron P Parting PVD K25 - K40 K K K K
    Tungaloy AH725 K K - Cast Iron P Parting PVD K25 - K30 K K
    Mitsubishi VP10RT K K - Cast Iron P Parting PVD K05 - K15 K K K
    Mitsubishi VP20RT K K - Cast Iron P Parting PVD K10 - K25 K K K K
    Mitsubishi VP30RT K K - Cast Iron P Parting PVD K20 - K40 K K K K K
    Sumitomo AC425K K K - Cast Iron P Parting CVD K10 - K25 K K K K
    Sumitomo AC520U K K - Cast Iron P Parting PVD K15 - K30 K K K K
    Sumitomo AC1030U (AC530U) K K - Cast Iron P Parting PVD K20 - K40 K K K K K

    Grade for Grooving

    Brand Grade ISO Material app App Coating Apps Range 05 10 15 20 25 30 35 40 45
    Sandvik GC4325 K K - Cast Iron G Grooving CVD K10 - K40 K K K K K K K
    Iscar IC807 (IC907) K K - Cast Iron G Grooving PVD K05 - K15 K K K
    Iscar IC5010 (IC428) K K - Cast Iron G Grooving CVD K15 - K25 K K K
    Iscar IC808 (IC908) K K - Cast Iron G Grooving PVD K15 - K30 K K K K
    Iscar IC8250 K K - Cast Iron G Grooving CVD K25 - K40 K K K K
    Kennametal KCU10 K K - Cast Iron G Grooving PVD K05 - K15 K K K
    Kennametal KCU25 K K - Cast Iron G Grooving PVD K15 - K30 K K K K
    Kennametal KC5025 K K - Cast Iron G Grooving PVD K20 - K30 K K K
    Kennametal KCP25B (KCP25) K K - Cast Iron G Grooving CVD K30 - K40 K K K
    Walter WKP13S K K - Cast Iron G Grooving CVD K05 - K20 K K K K
    Walter WKP23S K K - Cast Iron G Grooving CVD K10 - K30 K K K K K
    Walter WKP33S K K - Cast Iron G Grooving CVD K20 - K40 K K K K K
    Seco TGK1500 K K - Cast Iron G Grooving CVD K10 - K20 K K K
    Seco CP500 K K - Cast Iron G Grooving PVD K15 - K30 K K K K
    Tungaloy T515 K K - Cast Iron G Grooving CVD K10 - K20 K K K
    Tungaloy GH130 K K - Cast Iron G Grooving PVD K25 - K40 K K K K
    Tungaloy AH725 K K - Cast Iron G Grooving PVD K25 - K30 K K
    Mitsubishi VP10RT K K - Cast Iron G Grooving PVD K05 - K15 K K K
    Mitsubishi MY5015 K K - Cast Iron G Grooving CVD K10 - K25 K K K K
    Mitsubishi VP20RT K K - Cast Iron G Grooving PVD K20 - K40 K K K K K
    Sumitomo AC425K K K - Cast Iron G Grooving CVD K10 - K25 K K K K
    Sumitomo AC520U K K - Cast Iron G Grooving PVD K15 - K30 K K K K
    Sumitomo AC1030U (AC530U) K K - Cast Iron G Grooving PVD K20 - K40 K K K K K

    Recommended Insert Cutting Edge Geometry for Cast Iron GG25

    Honing Size:0.05-0.10 mm / 0.002-0.004"
    Rake Angle:0° -0°
    Land Angle:Negative
    Land Width:0.30-0.40 mm / 0.012-0.016"

    Learn more about carbide inserts Cutting-Edge Geometry Parameters.

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